drm/ttm: return immediately in case of a signal

When a signal arrives we should return immediately for
handling it and not try other placements first.
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Chunming Zhou <david1.zhou@amd.com>
Tested-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/ttm/ttm_bo.c

@@ -979,7 +979,6 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 	uint32_t cur_flags = 0;
 	bool type_found = false;
 	bool type_ok = false;
-	bool has_erestartsys = false;
 	int i, ret;
 
 	ret = reservation_object_reserve_shared(bo->resv, 1);
@@ -1070,8 +1069,8 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 			mem->placement = cur_flags;
 			return 0;
 		}
-		if (ret == -ERESTARTSYS)
-			has_erestartsys = true;
+		if (ret && ret != -EBUSY)
+			return ret;
 	}
 
 	if (!type_found) {
@@ -1079,7 +1078,7 @@ int ttm_bo_mem_space(struct ttm_buffer_object *bo,
 		return -EINVAL;
 	}
 
-	return (has_erestartsys) ? -ERESTARTSYS : -ENOMEM;
+	return -ENOMEM;
 }
 EXPORT_SYMBOL(ttm_bo_mem_space);